[orca] Add debugging line

[Joanmarie Diggs <joanied src gnome org>]

commit 32c7738490109f779ed2e0c2e217086d567c9bce
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Tue Oct 29 14:24:01 2019 -0400

    Add debugging line

 src/orca/eventsynthesizer.py | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/src/orca/eventsynthesizer.py b/src/orca/eventsynthesizer.py
index dec8a1b6b..cf6725e18 100644
--- a/src/orca/eventsynthesizer.py
+++ b/src/orca/eventsynthesizer.py
@@ -344,6 +344,8 @@ def _obscuringBanner(obj):
     if not (left and right and left == right != document):
         return None
 
+    msg = "EVENT SYNTHESIZER: %s believed to be obscured by banner %s" % (obj, left)
+    debug.println(debug.LEVEL_INFO, msg, True)
     return left
 
 def scrollToTopEdge(obj, startOffset=None, endOffset=None):